Steam-boiler



(No Model.) 2 Sheets-Sheet 11 J. B. FLEMING.

STEAM BOILER. N0. 586,431. Patented July 13, 1897.

INVENTOR ATTORNEYS.

(No Model.) 2 Sheets"8heet 2.

' J. B. FLEMING.

STEAM BOILER.

' No. 586,431. Patented July 13. 1897;

INVE/VTUH h I WITNESSES.

dam mg ATTORNEYS. 4

UNITED STATES PATENT OFFICE.

JOHN B. FLEMING, OF FRISCO, UTAH.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 586,431, dated July 13,1897.

Application filed August 28, 1896. Serial No. 604,201. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN B. FLEMING, of Frisco, in the county of Beaverand State of Utah, have invented a new and Improved Steam-Boiler, ofwhich the following is a full, clear, and exact description.

The invention relates to a steam-boiler of that class in which thefeed-Water is introduced into a receptacle heated by the prod nets ofcombustion in the fire-box of the boiler and in which the feed waterthus primarily treated is conducted to the boiler proper.

The invention consists in such features of construction and combinationsas will be fully described hereinafter and defined in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both the figures.

Figure 1 is a sectional elevation of my invention, and Fig. 2 is alongitudinal section thereof on the line X X of Fig. 1.

The form of my invention illustrated in the drawings has twoboiler-shells A, horizontally mounted in suitable masonry and havingfire-boxes below them. The shells A are of the fire-tube type andcommunicate at their front end with branches B of a stack B, the stackarising vertically from the juncture of the branches B In a Inasonarysuperstructure D is held a horizontal purifier-shell E. A wall E isarranged below the shell E to form the bottom of a flue F. The flue Fcommunicates at the front end with the stack branches B at theirjuncture and at its rear end with a chamber F, leading to the firetubesof the shell E. The fire-tubes of the shell E conduct the gases from thefurnace forward into the stack B. Within the stack B and between thefront ends of the flue F and the fire-tubes of the shell E is located avalve B. When this valve B is closed, the gases from the furnace passrearward through the flue F and thence forward through the shell E andup the stack B. When the valve B is open, the gases pass directly upthrough the valve B and do not pass through the shell E and fine F.

A pump P is located between the boilers A and is in connection with avertically-extending pipe G, leading'into the shell E and terminatingnear the crown-sheets thereof. The pipe G is in connection withperforated pipes G, running longitudinally through the upper portion ofthe shell E. By means of the pump P the feed-water is forced upwardthrough the pipe G and into the shell E through the pipes G. A pipe Iruns from the lower portion of the shell E downward between the boilersA and communicates at its lower end with two horizontal andoppositely-runnin g branches 1, respectively running into the boilers A.Each branch I is commanded by a valve I A pipe L (see the dotted linesin Fig. 2) leads from the pipe G to the pipe I.

A valve g commands the pipe I. A valve g commands the pipe G at a pointabove the pipe L, and a valve g commands the pipe L between the pipes Iand Gr. When the shell E is in operation, the valves g g are open andthe valve g is closed. The feedwater then passes up the pipe G throughthe shell E and out through the pipe I into the boilers A. When theshell E is not in use, the valves 9 and g are closed and the valve g isopen, whereupon the water is passed from the pump P through the pipes-GL and branches 1 into the boilers A. It will thus be seen that while theinvention is principally adapted for use with the shell E should it fromany unusual cause be desired to dispense with the operation of the shellE the same may be cut out, as explained.

Within the shell E are located two blowout pipes H and H. The pipe H islocated at the bottom of the shell E and is perforated at points withinthe shell. A valve it commands the end of the pipe which is projectedbeyond the shell. This pipe serves to carry oif impurities which settleas sediment in the bottom of the shell E. The blow-out pipe H is locatedin the upper portion of the shell and, like the pipe H, is perforatedwithin the shell E and commanded by a valve h without the shell.

pipes J.

The pipe H serves to carry oif im-.

J are respectively commanded by valves J The steam thus led from theboilers A to the shell E assists in the heating of the feed-water. Underthese conditions the water is led by gravity from the shell E to theboilers A.

Then the parts of the apparatus are adjusted as shown in the drawings,the gases from the furnace pass first through the firetubes of therespective boilers, thence upward through the branches B of the stack B,through the flue F, chamber F, and forwardly into the stack B throughthe tubes of the shell E. The pump P being in operation forces thefeed-water into the upper portion of the shell in the form of a sprayagainst the heated surface of the shell. -This heats the water andcauses the separation of the impurities, as is understood from priordevices of this class. The water thus heated and purified passes out ofthe shell E by means of the pipe I and thence into the boilers A. If itbe unnecessary to heat and purify the feed-water, the valves of thepipes G, L, and I should be manipulated as explained, whereby to cut outof operation the shell E.

Having thus described my invention, I claim as new and desire to secureby Letters Patent l. A steam-boiler having two horizontal boiler-shells,a furnace beneath each shell, a stack branching to communicate with eachboiler, a feed-water heating and purifying shell located above theboiler-shells and intermediately of the same, fire-tubes within thepurifying and heating shell, a wall beneath said shell to form a fluecommunicating with the stack and leading to the rear ends of thefire-tubes in the heating and purifying shell, a valve within the stackat a point between the line and the discharge ends of the fire-tubes inthe heating and purifying shell, and a pipe leading from the heating andpurifying shell to the boiler-shells, substantially as described.

2. A steam-boiler having two horizontal boiler-shells, a furnace witheach shell, firetubes within each boiler-shell, a stack at the front ofthe boiler, a branch leading oppositely from each side of the stack andrespec tively communicating with the front ends of the lire-tubes withinthe boiler-shells, a wall located above the boiler-shells andintermediately thereof, a feed-water heating and purifying shell locatedabove the wall and forming a flue beneath the heating and purifyingshell, a valve within the stack at a point above the front end of theflue whereby to direct the products of combustion rearward through theflue, fire-tubes within the heating and purifying shell and leading theproducts of combustion forward into the stack above the valve therein,and means establishing communication between the interiors of the threeshells, substantially as described.

3. A steam-boiler having two horizontal boiler-shells, a feed-waterheating and purifying shell located above the boiler-shells, a pipeleading to the heating and purifying shell, a second pipe leading fromthe heating and purifying shell and-having branches respectively runningto the boiler-shells, a valve located within the second pipe at a pointabove the branches, a third pipe running between and communicating withthe two firstnamed pipes, a valve within the first-named pipe at a pointabove the third pipe, and a valve commanding the third pipe at a pointbetween the two remaining pipes, substantially as described.

4. In a steam-boiler having two horizontal boiler-shells, a stack branchin connection with each of the boiler-shells, a stack arising from thejuncture of the branches, a feedwater heating and purifying shellmounted above the boiler-shells and in termediately thereof, the heatingand purifying shell having a series of fire-tubes running into the stackand capable of having a draft from the horizontal boilers pass throughthem, a feedpump located below the horizontal boilers and intermediatelythereof, a pipe passing upward from the feed-pu mp and into the heatingand purifying shell, two perforated pipes running longitudinally throughthe heating and purifying shell and in connection with the verticalpipe, a perforated blow-out pipe within the heating and purifying shelland running longitudinally through it, and a valve located within thestack and below the discharge ends of the fire-tubes within the heatingand purifying shell whereby the valve may change the direction in whichthe draft passes from the boiler-shells, substantially as described.

5. A steam-boiler having a boiler-shell, a wall running above theboiler-shell, a heating and purifying shell located above the wall andforming a fine between the heating and purifying shell and the wall, astack running from the boiler-shell upward past the heating andpurifying shell, the stack communicating with the gas-passages of theboiler-shell and of the heating and purifying shell, and the stack alsocommunicating with the said flue, the rear end of the flue being incommunication with the gas-passages of the heating and purifying shell,and a valve located within the stack and between the fiue and theheating and purifying shell whereby the stack may be opened and closedand the draft caused to pass through the flue into the rear end of theheating and purifying shell and thence outward into the stack or to passdirectly through the stack, substantially as described.

JOHN B. FLEMING.

Witnesses:

J. W. DUNN, A. K. FARNswoRTH.

